A basic DDE Server that accepts LinkExecute commands
A mIRC DDE Example
DDE Example communicating between apps
DDE Peer Sample
DDE Server (mIRC)
DDEMLv2.zip
Easy SendKeys
Exchange data between two applications easily
Get displayed url from browser using DDE
How Apps Can Communicate By DDE Link 
Link Monitor
Multitasking
Prevent more than one instance
PrintGrid
Winsock based inter-application communication
VBcoders